Letting a ruler get away with power grabs and abuses guarantees that worse will come, from him or from his successors. This is the lesson of the failure to impeach recent U.S. presidents. For those who haven't understood this yet, here's a helpful FAQ.

Now, here are the 20 surest ways to impeach Trump:

1. Violation of Constitution on Domestic EmolumentsIn his conduct while President of the United States, Donald J. Trump, in violation of his constitutional oath to faithfully execute the office of President of the United States and, to the best of his ability, preserve, protect, and defend the Constitution of the United States, and in violation of his constitutional duty under Article II, Section 1 of the Constitution "to take care that the laws be faithfully executed," has illegally received emoluments from the United States government and from individual state governments.

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The Constitutional ban on domestic emoluments (Article II, Section 1) is absolute, not waivable by Congress, and not subject to proving any particular corrupting influence.

President Trump's lease of the Old Post Office Building in Washington D.C. violates the General Services Administration lease contract which states: "No " elected official of the Government of the United States " shall be admitted to any share or part of this Lease, or to any benefit that may arise therefrom." The GSA's failure to enforce that contract constitutes an emolument. A January 16, 2019, report by the Inspector General of the General Services Administration confirmed this.

Since 1980 Trump and his businesses have garnered, according to the New York Times, "$885 million in tax breaks, grants and other subsidies for luxury apartments, hotels and office buildings in New York." Those subsidies from the state of New York have continued since President Trump took office and constitute emoluments. The Trump organization receives emoluments from other states as well.

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In these and many similar actions and decisions, President Donald J. Trump has acted in a manner contrary to his trust as President, and subversive of constitutional government, to the prejudice of the cause of law and justice and to the manifest injury of the people of the United States. Wherefore, President Donald J. Trump, by such conduct, is guilty of an impeachable offense warranting removal from office. (back to top)

2. Violation of Constitution on Foreign EmolumentsIn his conduct while President of the United States, Donald J. Trump, in violation of his constitutional oath to faithfully execute the office of President of the United States and, to the best of his ability, preserve, protect, and defend the Constitution of the United States, and in violation of his constitutional duty under Article II, Section 1 of the Constitution "to take care that the laws be faithfully executed," has illegally received emoluments from foreign governments. Foreign emoluments are banned by the U.S. Constitution (Article I, Section 9).

Donald J. Trump's business has licensing deals with two Trump Towers in Istanbul, Turkey. Donald J. Trump has stated: "I have a little conflict of interest, because I have a major, major building in Istanbul."

China's state-owned Industrial and Commercial Bank of China is the largest tenant in Trump Tower in New York City. It is also a major lender to the Trump organization. Its rent payments and its loans put President Trump in violation of the U.S. Constitution.

Foreign diplomats, including the Embassy of Kuwait, have changed their Washington D.C. hotel and event reservations to Trump International Hotel following Donald J. Trump's election to public office.

In these and many similar actions and decisions, President Donald J. Trump has acted in a manner contrary to his trust as President, and subversive of constitutional government, to the prejudice of the cause of law and justice and to the manifest injury of the people of the United States. Wherefore, President Donald J. Trump, by such conduct, is guilty of an impeachable offense warranting removal from office. (back to top)

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3. Incitement of ViolenceIn his conduct while President of the United States, and while campaigning for election to that office, Donald J. Trump, in violation of his constitutional oath to faithfully execute the office of President of the United States and, to the best of his ability, preserve, protect, and defend the Constitution of the United States, and in violation of his constitutional duty under Article II, Section 1 of the Constitution "to take care that the laws be faithfully executed," has illegally incited violence within the United States.

A partial sampling of public statements by candidate Donald J. Trump:"If you see somebody getting ready to throw a tomato, knock the crap out of them. I promise you, I will pay for the legal fees."

"You know what I hate? There's a guy, totally disruptive, throwing punches, we're not allowed to punch back anymore. I love the old daysyou know what they used to do to guys like that when they were in a place like this? They'd be carried out on a stretcher, folks."

David Swanson is the author of "When the World Outlawed War," "War Is A Lie" and "Daybreak: Undoing the Imperial Presidency and Forming a More Perfect Union." He blogs at http://davidswanson.org and http://warisacrime.org and works for the online (more...)

"Rob Kall has certainly acquired the firsthand experiences and knowledge gained through interviews to deliver some interesting insights about the "bottom-up" information revolution. Whereas the old 'top-down' systems created stove-pipes and excessive secrecy that blocked information sharing and led to the 'failure to connect the dots' before 9-11, the bottom-up approach should be the main fix. Kall's concept would seem to interface equally well with the founding fathers' idealism in setting forth their democratic theory of governance as with the realism that makes the multi-sourced, bottom-up Wikipedia work. As someone who shares my support of both government and corporate whistleblowing -- which is nothing more than encouraging greater horizontal sharing of information, I commend Rob Kall's important work on this topic."

Coleen Rowley, former FBI special agent and named one of TIME Magazine's "Persons of the Year" in 2002)